Discovery error scenarios and results
Discovery error scenarios and resultsdescribes different discovery
error scenarios and results. Initial discovery refers to an attempt
to discover a system that has not been previously discovered, and
thus is not in the modeled topology. Rediscovery refers to an attempt
to discover a system that is already in the topology.
Discovery or rediscovery | Condition | Result |
|---|---|---|
Discovery (initial discovery) | Cannot resolve
hostname to IP address. | Add system to Pending Devices list.
System hostname does not resolve to an IP address provides more information. |
No response from
ICMP ping. | For a seed system (manual discovery), add
system to the Pending Devices list as UNDISCOVERED. For a system
that is found through autodiscovery, discard system. | |
No response from SNMP agent. | For a seed system
(manual discovery), add the system to the Pending Devices list as
UNDISCOVERED. For a system that is found through autodiscovery,
and ShowPendingNONSNMP set to TRUE, add the system to the Pending
Devices list as UNDISCOVERED. For a system that is found through
autodiscovery, and ShowPendingNONSNMP set to FALSE, discard the system. System does not support SNMP provides more information. | |
ICMP response and SNMP response; current
system limit exceeded. | For a seed system (manual discovery)
or a system that is found through autodiscovery, display System limit
exceeded message in the Discovery Progress window and add the system
to the Pending Devices list as UNDISCOVERED. | |
ICMP response and SNMP response; manual accept mode enabled for
discovery filter. | For a system that matches the discovery
filter, add the system to the Pending Devices list as THROTTLED. | |
Insufficient number of volume licenses,
which prevents complete discovery of systems. | Stop
discovery process and send an OutOfLicense notification. Show
“Out of license” message in the Discovery Progress window. Add
any new discovery candidate systems to the Pending Devices list as
UNDISCOVERED. | |
Discovery completes successfully. | Classify system in accordance to its sysObjectID and
add to topology. If the OID is not recognized, classify system as
a Node. | |
Rediscovery | Receive
no response from SNMP agent: SNMP request times out. | Send
notification, typically Agent NotResponding, which is based on the
correlation analysis, and send a DiscoveryError notification. |
SNMP agent encounters a loop, which prevents the system
from being discovered. | Classify system according to
its sysObjectID, add to topology, and send a DiscoveryError notification. | |
No response from ICMP ping. | Send notification, typically Down, and send a DiscoveryError notification. | |
Discovery not able to contact SNMP agent
at known address. | Send a DiscoveryError notification. | |
SNMP agent fails authentication. | Send a DiscoveryError notification. |